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-rw-r--r--src/ctype/isalnum.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/ctype/isalnum.c b/src/ctype/isalnum.c
new file mode 100644
index 00000000..e3d2cf0b
--- /dev/null
+++ b/src/ctype/isalnum.c
@@ -0,0 +1,6 @@
+#include <ctype.h>
+
+int isalnum(int c)
+{
+ return isalpha(c) || isdigit(c);
+}